Maintenance and Inspection8- 13 Circulation Fan Replacement OutlineWith some capacities, there is a small fan installed inside the Inverter for the purpose of increasing circulationin areas where heat has built up. These fans have built-in fan sensors that output an alarm when the rotationrate of the fan drops to indicate that replacement is necessary.200 V and 400 V Class Inverters of 11 kWThe circulation fan is installed behind the control circuit terminal board inside the Inverter.The circulation fan can be replaced by removing the control circuit terminal board.Removing the Circulation Fan1. Remove the Digital Operator, the terminal cover, and the front cover.2. Remove the control circuit terminal board. Remove the cables connected to the terminals if necessary.3. While pushing the two tabs (A) in direction 1, pull the fan out in direction 2.4. Remove the relay connector connected to the fan.Mounting the Circulation FanReverse the above procedure to mount the fan.Be sure to mount the fan so that the air flows towards the top of the Inverter (direction indicated by the arrow).Mount the fan securely using the tabs (A).Confirm that there are no cables in contact with the fan’s rotating parts.Fig 8.8 Circulation Fan Replacement (200 V and 400 V Class Inverters of 11 kW)21ControlboardAirflow directionTabs (A)Circulation fanInverter with Control Circuit Terminal Board Removed
